Specifications

CAK50/CAK61 SERIES ERROR! USE THE HOME TAB TO APPLY 标题 1 TO THE TE
X
SHENYANG MACHINE TOOL CO., LTD 37
This machine can be provided with two kinds of hydraulic system for user to select: One
is to have hydraulic chuck and hydraulic tailstock, and the other one is only to have
hydraulic chuck. For the machine without hydraulic tailstock, the overlad return of
tailstock has been removed, and all the other parts are remained the same.
This section only explains the circuit and principle of the hydraulic chuck, and all the
other parts are the same as the description above.
 Chuck return
The chuck return consists of single-way valve, relief valve, electromagnetic reversing
valve and pressure relay. Single-way valve MC
—02P prevents interference of
clamping return with the other returns, relief valve MPR
—02A is used to adjust
clamping pressure of the chuck and the adjusting range of the clamping force is 1.2
～
2.5 Mpa according to the need of the workpiece to be turned. When the electromagnet
YV1is electrifying, the chuck will clamp, when the electromagnet YV2 is electrifying,
the chuck will release.
After the workpiece is clamped, the pressure relay PS
—70（SP1）sends out a ready
signal, during machining if the pressure goes down due to system’s trouble, SP1 will
send out an alarm signal, the machine stops.
5.2.6.2 Hydraulic-spindle Change Speed and Hydraulic Chuck
The machine employs hydraulic-spindle change speed to improve the automation of the
machine, besides, the machine is provided with hydraulic chuck. The hydraulic oil tank
is located on the side of the headstock, and all the hydraulic control components are
from Taiwan Janus Co. The hydraulic control valves are mounted in the front of the oil
tank under overlad-mode, which provided the machine with compact construction and
convenient installation.
 The major parameters of the hydraulic system
Hydraulic motor: Y90L-4 (B5), 1.5kW, 1450r/min
Hydraulic pump: VP-20-F-A2
Adjusting range of pressure: 1.5~3.6Mpa
Max. flow capacity: 11.1ml/r
Volume of oil tank: 90L
Pressure of hydraulic system: 2.5Mpa
Overall dimensions of oil tank: 600 mm
×460 mm×800mm
 Oil resource
The hydraulic system adopts VP variable vane-type pump made by Taiwan Janus
Co., and the noise of this kind of pump is low and the performance stable. Its rate
delivery capacity is 11.1 ml/r and actual flow of the pump can be adjusted
according to the speed of chuck movement. There is a pressure adjusting